System of current distribution.



C. LE 6. FORTESCUE.

SYSTEM OF CURRENT DISTRlBUTION.

APPLICATION FILED JUNE 21.19I2.

1,154,852. PatentedSept. 28, 1915.

UNITED STATES PATENT CI- IARLES LE G. FORTESCUE, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNDE T0 513ESE13.I'

HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CGRPGRfATTQZN 315* EI'L'JNNQ;

V ANIA.

SYSTEM OF CURRENT DISTRIBUTION" Specification ofFctters Patent. Fg t@3it3( l Sept. 2 55,

- Application filed June 21, N12. Serial No. 705,914.

'rnscnn, a subject of the King of Great ritain, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful improvement in Systems of Current Distribution, ofwliich the following IS a speci fication.

My invention relates to systems of distributions in which alternating current is rectified by means of mercury vapor and similar devices, andparticularly to such systems as embod. transformer regulators for maintaining t .e rectifiedcurrent substantially a uniform in} value.

In the single figure of the accompanying drawing, which diagrammatically illustirates a system embodying my invention, two mercury vapor or other suitable rectifying devices 1 and 2 are supplied withcurrent from the secondary windings 3 and i, respectively, of a regulating transformer 5, the primary coils 6 and 7 of which are connected in series relation to a suitable supply circuit The regulating transformer caniprises further a magnetizable core 9 having three legs, the central one of which is surrounded by the primary coils 5 and 7 and the secondary coils 8 and the latter being located at opp'bsite ends thereof, and the former being disposed and movable between the secondary colls. The primary coils ar independently movable and. are counterbalanced by being supported by cables or chains 10 and 11 mm, pass over pulleys 12 and-I3 and'are connected to heights 14 and 15, the )iBlZttlOIlS df the Weights of the severai par s being such that the coils 6 and 7 will normally be closelyadjacent to the coils 3 and 4 respectively.

I The anodes of the rectifier 1 are connected 'to the terminals of the secondary winding 3, and the cathode is connected to an intermediate point of the said winding, an impedance device 16 and suitable translating devices 17, constituting loads, being included in the said connection. The rectifier 2 is connected in a similar manner to the sec-- ondarv winding 1-. The impedance devices to 16 are provided for the purpose of snstaining the rectified current.

In the operation of the system, mary coils 6 and '5' of the regular caused, by the magnetic forces acting be tween them and the secondary windings, occup" positions depending upon the load upon the secondary circuit and such that t rectified current will have substantially uniform value. As the rectifiers are con- 6 nectedindependently to the respective secondary windings, and the corresponding primary and secondary windings at oppositc ends of the core leg, the two sets of coils and the two secondary circuits are not 85 in close inductive relation. if a short circuit occurs in one of the current rectifiers, both halves of the secondary member of one of the sets of transformer windings Will be traversed simultaneously by the short cir- 7o cuit current. The said current will induce currents in the primary Winding and, byreason of the poor inductive relation be tween the primary coils 6 and 7, the coil '2 will oppose a high'reactance tqjthe fiovv of the current induced in the primary circuit by the short circuit current in the secondary circuit. Such being the case, the short circuit current will. be limited to a comparetively small and harmless value. Furthermore, by reason of the high. impedance to the flow of short circuit current, the short circuits themselves are rendered of infrequent occurrence.

I claim as my invention p 1. The combination with a transformer comprising two secondary coils and two gorimary c'oilsthat are disposed and movably mounted between the secondary coils, of two current rectifiers that are independently connected to the secondary coils, one of them being connected to one of'said coils and the other to the other coil.

2. The combination with a transformer comprising a core, and primary and secondmy coils surroainding a part of said core,

subscribed my name this 18th day of June, 1912.

CHARLES LE G. FORTESCUE.

Witnesses:

OTTO S. SOHAIRER, B. B. HIxEs. 

